Toms Hardware has made a speaker-roudup for all surroundfreaks. (somehow I have myself never understood this as I rather connect my computer to my receiver) Nevertheless, the test covers 5.1, 6.1 and 7.1 systems and we find manufacturers such as Terratec, Logitech and Creative in the test. They seem to have found good speakers within each price-category and the testing has been done very thorough, albeit a bit too spartan and technical for my own taste.
Read the article here.